/*
 * Copyright (C) 2012 Markus Junginger, greenrobot (http://greenrobot.de)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package android.bus;

final class Subscription {
	final Object subscriber;
	final SubscriberMethod subscriberMethod;
	final int priority;
	/**
	 * Becomes false as soon as {@link EventBus#unregister(Object)} is called, which is checked by queued event delivery
	 * {@link EventBus#invokeSubscriber(PendingPost)} to prevent race conditions.
	 */
	volatile boolean active;

	Subscription(Object subscriber, SubscriberMethod subscriberMethod, int priority) {
		this.subscriber = subscriber;
		this.subscriberMethod = subscriberMethod;
		this.priority = priority;
		active = true;
	}

	@Override
	public boolean equals(Object other) {
		if (other instanceof Subscription) {
			Subscription otherSubscription = (Subscription) other;
			return subscriber == otherSubscription.subscriber
					&& subscriberMethod.equals(otherSubscription.subscriberMethod);
		} else {
			return false;
		}
	}

	@Override
	public int hashCode() {
		return subscriber.hashCode() + subscriberMethod.methodString.hashCode();
	}
}